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Gdio53 is correct. Satellite technology (like GPS) is similar to an FM radio tower. The satellites (like a radio tower) just send out the signal, and your GPS receiver (like a radio) simply receives it. It's a little more complex than this, but just wanted to put it in simple terms. But yes, it is free to use.....just need a GPS receiver and software.
--deftech
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Jordan M. Wigley
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